We really do not know ah battery, it is necessary for everyone to make up classes. NiMH batteries have memory effect, but no significant nickel-cadmium batteries. The most obvious is the memory effect of lithium batteries. Memory effect is not obvious means you can charge several times, and even used on each charge will not impact too much play. Therefore, use nickel-metal hydride batteries, generally can not consider the discharge and direct charge.
Of course, from the perspective of long life, about 30-50 times the charge and discharge, can do a deep discharge, in order to restore to the maximum capacity. AUDIOPHONE said discharge is not as simple, then a small light bulb, until you can not light. This would tend to over-discharge, but damage the battery.
We all know that a nickel-metal hydride HP EliteBook 2530p battery voltage is 1.2V, when fully charged in just more than the actual value, generally between 1.4-1.5V. With use, the voltage will gradually reduce, in general, the use of occasions, when the voltage is below 1V, you basically can not be used, such as WALKMAN, CD DISKMAN, MD, MP3, DC, and so on. You can test "run out of power," the battery voltage is.
However, if the occasion is a low voltage, low current will continue to discharge. We are talking generally refers to the depth of discharge voltage down to 0.85V-0.9V between. By low voltage, low current discharge, to achieve this value, the nickel-metal hydride batteries (including nickel-cadmium) can be restored to the maximum capacity and prolong life. But if it continues to discharge below 0.8V once may result in irreversible damage to the battery, but battery life is affected. This is why the method is not recommended AUDIOPHONE reason, because you can not control the voltage to a certain value will automatically stop. Similarly, nickel-cadmium batteries and nickel-metal hydride batteries are not recommended for the remote control like a small electrical current.
Depth of discharge of the battery better way is to buy the TOSHIBA PA3399U-1BAS battery charger with discharge function or specialized discharger. The easiest way is to use AUDIOPHONE way, but be sure to read the voltage value table is often used, once the danger zone to stop. If it is connected in series, then simply multiplied by the battery voltage is above the number on it.
And then the battery is not about long-term preservation and restoration methods. Note that, because the nickel-cadmium batteries and nickel-metal hydride battery characteristics are different, so different preservation methods leaves. Nickel-cadmium hp laptop batteries is to run out of power to save, so we bought before the new nickel-cadmium battery is basically no electricity, you need to reset their own. In general, use the correct charging method takes about 3-5 times to charge and discharge the battery back to its best. The nickel-metal hydride batteries to long-term preservation, it should be charged to 80% (this we all should be counted), then save. This is why now buy the new nickel-metal hydride batteries came back somewhat because of electricity, because the manufacturers have pre-charge, to prevent the transport cycle time is too long, while the battery is affected. Long-term preservation of the nickel-metal hydride battery, when I run out of power first, then the right way to charge 2-3 times can be restored to the best state. (After dinner, continue! Oh)
Let me say on the issue of IBM ThinkPad T43 battery charging. In fact, the most difficult to master is the correct charge. Points from the charging current to charge, fast charge and trickle charge a difference. From the charging point of view, there is constant current charge and pulse charge the difference. Many people have this problem, what is a good fast charge or slow charge is good.
Then we take a look at what is fast filling and slow filling what is. Battery with a nominal capacity of 1C, the 0.1-0.2C charging current of the slow charge,> 0.2C for quick charge,> 0.8C for ultra-fast charging, <= 0.05C of the trickle charge is . With a 1400MAH Ni-MH batteries, for example, the charge current between the 140MA-280MA is a slow charger, and the same 280MA charging current of a battery is 700MAH is fast charge. Thus, the fast charge or slow charge is a relative concept, and the capacity of the battery itself has great relevance.
Return to the previous question, what is a good fast or slow is good? ! In fact, this is no fixed answer. Many people think that slow is good, that will hurt the fast-charge batteries. What will hurt the battery fast charge? The answer is yes, but not because a lot of people think the "high current charging damage the battery." Large current is at best an accomplice, the real reason is heat, because heat caused by high current. High temperature on battery life have a great impact. So high current is not terrible, headache is how to solve the heat problem.
Here, it is necessary to introduce constant current HP Pavilion DV8000 Battery charging and pulse charging concept. In the slow charge, it is basically all the chargers are constant current charging method used, so that the circuit design is simple, easy to implement. And because the charge current in the slow range, and will not cause the battery overheating. Fast current charge to use the issue, then use the constant current mode, no doubt unable to avoid battery overheating problem, so the constant current method was abandoned. Instead, the pulse mode, can be seen from the waveform, the output charge current is not linear, but the sine wave. Peak, the current maximum, and then immediately into the trough, almost no current. This design is intended to allow the Toshiba battery to have a recovery time, thus reducing the heat generated by high current, battery heat control at an acceptable level. Now see the hundreds of dollars on the market about the rapid charger, basically using this method. And such a voltage charger is also used to determine slope or delta method to determine the method to determine whether the battery is full, once full turn on automatically trickle charge to avoid a large current over time damage the battery. Relatively well-known example is the recommendation of friends who each fresh cow KN5060 charger. The Chargers are in the major electronic markets, which can be between the 65-70 win, work is not very sophisticated, but the results are good, are highly cost-effective products.
Pulse mode to produce fast HP Pavilion dv4 Battery charger is a good solution, but for some abnormal demands, such as 1 hour quick charger, this time to adopt ultra-high speed greater than 1C charging current for charging, pulse method on insufficient. Is now used internationally are basically added depolarization pulse method as the way. Simply put, that is based on the pulse method, when the upper half of a sine wave is completed, insert a short negative voltage of the cosine wave, the current is too large to offset the enormous heat (polarization response) to the battery heat under control. This method is generally only in the more specialized chargers, such as model aircraft used by professional players on the charger used. Such chargers are often used 2C-3C can be done on the battery charge current.
That these methods, from the perspective of battery life, slow constant current charging is undoubtedly the best way to ensure that the APPLE Laptop Battery replacement life. But from the perspective of time is money, fast charger time savings benefits, damage battery life than the loss of about 10% larger. This is why fast chargers are popular.
Finally, talk about the chewing gum batteries. Many MP3 players say the MD player, you do not to use chewing gum batteries, or how the two of us playing time will be so much worse.
This concept is wrong, the battery is the battery of a chewing gum form, the essence is still the nickel-metal hydride batteries. In other words, a gum 1350MAH 1350MAH battery and a battery of Ni-MH playback is the same, no difference. In fact Ni-MH HP ProBook 6540b Battery have been a 1800MAH capacity, far more than chewing gum batteries. Gum battery production, is to do as far as possible the thin Walkman devices, 5 thin battery specifications do not, and 7, the battery capacity and platform size is small, so small in Japan came up with this approach, not because gum battery capacity is particularly great. And chewing gum are also nickel-metal hydride battery in nickel-cadmium and the difference between the early nickel-cadmium batteries, but chewing gum is only 600MAH, not the current nickel-metal hydride battery 750MAH 7 large.
2011年10月26日星期三
2011年10月6日星期四
Maintenance of GFM lead-acid battery
Battery powered system is indispensable equipment, fixed-type valve-regulated (GFM) for lead-acid batteries with no water, no overflow acid, acid fog has been very little room so widely used. Battery life is certain, if not understand the electrical characteristics of the battery, usually pay no attention to maintenance, it will lead to capacity loss and premature failure, once the Sony VGP-BPS9/S battery capacity decline and reach a predetermined discharge time, we can not guarantee the transmission of television programs and even cause major accidents, we must understand the performance of the battery, and can properly use and maintain.
In order to maintain the capacity of lead-acid battery GFM and extend its life, we experience summed up according to the following maintenance methods:
(1) to maintain proper spacing. Oxygen recombination process inside the battery generates more heat, but emit less gas, reducing heat loss, the internal battery temperature is usually high, so the battery should be placed in well-ventilated place, not too closely arranged, between the individual cells should be at least 10 mm spacing.
(2) maintain the appropriate temperature. Temperature, chemical reactions speed up, lead and acid to enhance the interaction, prone to sulfation, reduced service life; temperature is too low, thick sulfuric acid, e-free slow, poor electrode active, the Sony VGP-BPS5 battery capacity decline. 10 ~ 30 ℃ temperature is more appropriate, according to the actual situation can use various means to adjust the temperature.
(3) to keep clean. Weekly wipe the dust on the battery and the rack to keep the battery clean. The accumulation of too much dust, make bad battery connection point, change the battery charge and discharge voltage, prone to failure. Remember when the battery clean dry cloth or brush to use, it is best to use a vacuum cleaner.
(4) inspected once a day. Day time look at the battery, a slightly acidic News smell in the air whether, if slightly acidic odor, is discharged battery acid mist, ventilation should be timely processing; the second depends on whether the deformation of the shape of the battery, CANON BP-522 battery terminals and valve with or without exudate, normally open valve can, if necessary, to replace the battery.
(5) Weekly test voltage. Single-cell battery float voltage is 2.25 V, not less than 2.16 V. Voltage selection is too low, individual battery charge due to insufficient long-term passivation and void float voltage is too high, the gas overflow increased, gas recombination efficiency is low. Batteries are charging voltage is 2.35 V, should not exceed 2.40 V, the charging voltage is too high will cause the charge current is too large, the heat will make the electrolyte temperature, the temperature drop will cause the battery internal resistance, internal stop the decline and increase the charge current, so the cycle will make the battery deformation and cracking. Note: When testing the battery voltage value, the battery must be measured on the two end points, if the other at the test, will have a voltage drop, the test results are not very accurate.
(6) monthly measurement of single Acer travelmate 6000 battery voltage. More likely to use the number of batteries in series the presence of voltage imbalance, voltage is easy to produce long-term imbalances behind the battery, behind the battery if charging is not complete, the discharge in the future will further increase in the depth of discharge, after the charge even further behind. In this way, the more charge and discharge times, the more prominent uneven, resulting in behind the battery is dead. So every single month should be measured battery voltage value of less than 2.2 V battery to conduct an "equalizing charge" to make it back to the fully charged state, in order to avoid the failure of the individual behind the battery.
(7) half-yearly charge and discharge, this has two advantages:
① the capacity of the battery can be tested to assess the capacity of the battery;
② can remove sulfate. Discharge in two ways, one is the direct discharge load (higher load used), which cut off the external power supply, Dell XPS M1210 battery powered directly release the full capacity of 70%; the other is false load discharge
(Using small loads), dummy load using a variable resistor in parallel to the ends of battery, external power supply cut off by the battery-powered, with a small discharge at the beginning of the current, gradually increase the current, do not discharge immediately after unloading under the false load, should wait for full battery and then removed to avoid the high current batteries are charged when the danger of arcing.
(8) Do not discharge when the voltage is lower than the termination voltage. Battery discharge to the termination voltage, the voltage would drop dramatically if we continue to discharge the electricity received little meaningful, but will reduce IBM Thinkpad r30 Battery life, so the voltage drop through the discharge termination voltage to the discharge should be stopped . Different discharge rates, the termination voltage is different, the discharge rate of large lead sulphate generated less, even if the discharge to a very low voltage, the plate will not be damaged, single-cell battery can be discharged to 1.75 V; discharge rate is small significantly increased the amount of lead sulfate, and the active material expansion will cause stress, resulting in bending or plate active material shedding, affecting the battery life, so they requested the termination to take a higher voltage, usually in the 1.80 ~ 1.85 V.
(9) Do not over-discharge. GFM lead-acid batteries used in the cycle, its life depends on depth of discharge. Deeper depth of discharge, PbO2 particles between the combination of more relaxation, ease off, cycle life will be shortened. In 50% depth of discharge, to access the generator for ACER Aspire 7520 Adapter power supply, battery capacity to be restored after the power supply.
(10) Do not mix old and new batteries as much as possible, because in the process of charging the new battery voltage to rise rapidly, likely to cause the old battery charge is not full, always under-voltage condition, this impact battery life.
(11) idle time charging the battery every quarter, because of long idle negative battery will form a thick, difficult to accept the charge of PbSO4 crystals, this phenomenon is known as irreversible sulfate, can cause premature battery failure.
Battery life is generally about 8 years since we stick with the maintenance methods, the company purchased in 1994 by the battery capacity test, is still within the Acer Aspire 5720 adapter design capacity, you can continue to use.
In order to maintain the capacity of lead-acid battery GFM and extend its life, we experience summed up according to the following maintenance methods:
(1) to maintain proper spacing. Oxygen recombination process inside the battery generates more heat, but emit less gas, reducing heat loss, the internal battery temperature is usually high, so the battery should be placed in well-ventilated place, not too closely arranged, between the individual cells should be at least 10 mm spacing.
(2) maintain the appropriate temperature. Temperature, chemical reactions speed up, lead and acid to enhance the interaction, prone to sulfation, reduced service life; temperature is too low, thick sulfuric acid, e-free slow, poor electrode active, the Sony VGP-BPS5 battery capacity decline. 10 ~ 30 ℃ temperature is more appropriate, according to the actual situation can use various means to adjust the temperature.
(3) to keep clean. Weekly wipe the dust on the battery and the rack to keep the battery clean. The accumulation of too much dust, make bad battery connection point, change the battery charge and discharge voltage, prone to failure. Remember when the battery clean dry cloth or brush to use, it is best to use a vacuum cleaner.
(4) inspected once a day. Day time look at the battery, a slightly acidic News smell in the air whether, if slightly acidic odor, is discharged battery acid mist, ventilation should be timely processing; the second depends on whether the deformation of the shape of the battery, CANON BP-522 battery terminals and valve with or without exudate, normally open valve can, if necessary, to replace the battery.
(5) Weekly test voltage. Single-cell battery float voltage is 2.25 V, not less than 2.16 V. Voltage selection is too low, individual battery charge due to insufficient long-term passivation and void float voltage is too high, the gas overflow increased, gas recombination efficiency is low. Batteries are charging voltage is 2.35 V, should not exceed 2.40 V, the charging voltage is too high will cause the charge current is too large, the heat will make the electrolyte temperature, the temperature drop will cause the battery internal resistance, internal stop the decline and increase the charge current, so the cycle will make the battery deformation and cracking. Note: When testing the battery voltage value, the battery must be measured on the two end points, if the other at the test, will have a voltage drop, the test results are not very accurate.
(6) monthly measurement of single Acer travelmate 6000 battery voltage. More likely to use the number of batteries in series the presence of voltage imbalance, voltage is easy to produce long-term imbalances behind the battery, behind the battery if charging is not complete, the discharge in the future will further increase in the depth of discharge, after the charge even further behind. In this way, the more charge and discharge times, the more prominent uneven, resulting in behind the battery is dead. So every single month should be measured battery voltage value of less than 2.2 V battery to conduct an "equalizing charge" to make it back to the fully charged state, in order to avoid the failure of the individual behind the battery.
(7) half-yearly charge and discharge, this has two advantages:
① the capacity of the battery can be tested to assess the capacity of the battery;
② can remove sulfate. Discharge in two ways, one is the direct discharge load (higher load used), which cut off the external power supply, Dell XPS M1210 battery powered directly release the full capacity of 70%; the other is false load discharge
(Using small loads), dummy load using a variable resistor in parallel to the ends of battery, external power supply cut off by the battery-powered, with a small discharge at the beginning of the current, gradually increase the current, do not discharge immediately after unloading under the false load, should wait for full battery and then removed to avoid the high current batteries are charged when the danger of arcing.
(8) Do not discharge when the voltage is lower than the termination voltage. Battery discharge to the termination voltage, the voltage would drop dramatically if we continue to discharge the electricity received little meaningful, but will reduce IBM Thinkpad r30 Battery life, so the voltage drop through the discharge termination voltage to the discharge should be stopped . Different discharge rates, the termination voltage is different, the discharge rate of large lead sulphate generated less, even if the discharge to a very low voltage, the plate will not be damaged, single-cell battery can be discharged to 1.75 V; discharge rate is small significantly increased the amount of lead sulfate, and the active material expansion will cause stress, resulting in bending or plate active material shedding, affecting the battery life, so they requested the termination to take a higher voltage, usually in the 1.80 ~ 1.85 V.
(9) Do not over-discharge. GFM lead-acid batteries used in the cycle, its life depends on depth of discharge. Deeper depth of discharge, PbO2 particles between the combination of more relaxation, ease off, cycle life will be shortened. In 50% depth of discharge, to access the generator for ACER Aspire 7520 Adapter power supply, battery capacity to be restored after the power supply.
(10) Do not mix old and new batteries as much as possible, because in the process of charging the new battery voltage to rise rapidly, likely to cause the old battery charge is not full, always under-voltage condition, this impact battery life.
(11) idle time charging the battery every quarter, because of long idle negative battery will form a thick, difficult to accept the charge of PbSO4 crystals, this phenomenon is known as irreversible sulfate, can cause premature battery failure.
Battery life is generally about 8 years since we stick with the maintenance methods, the company purchased in 1994 by the battery capacity test, is still within the Acer Aspire 5720 adapter design capacity, you can continue to use.
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